📖 Olivekl v4 doc updates (ossf#1481)

* Create scorecards-analysis.yml

* Update README.md

Move Public Data section
Add placeholders for new installation organization, TODOs for public data section

* Update README.md

Remove outdated public data scoring system paragraph

* Update README.md

Add explanation of Scorecard Action install option and link out

* Update README.md

Add sentence introducing CLI installation section; move all heading down a level for that section

* Update README.md

Fix typo

* Update README.md

Remove comma

* Delete scorecards-analysis.yml file

Co-authored-by: Azeem Shaikh <[email protected]>

✨ Unit test for all_checks

Addresses ossf#435

Signed-off-by: naveen <[email protected]>

🌱 v3 upgrade changes (ossf#1118)

v3 go.mod changes

⚠️ remove CSV support (ossf#1119)

* remove CSV support

* fixes

Return DefaultBranch as part of ListBranches (ossf#960)

Co-authored-by: Azeem Shaikh <[email protected]>